Answer:
-5.12%
Step-by-step explanation:
The annual rate of return can be determined using the future value formula given below:
FV=PV*(1+r)^n
FV is the value of the sculpture in 2015 which is $10,479,500.
PV is the original value of $12,929,500.
n is the number of years the sculpture was owned which is 4 years
r is the unknown
10,479,500=12,929,500*(1+r)^4
10,479,500/12,929,500=(1+r)^4
0.810510847 =(1+r)^4
divide the index on both sides by 4
(0.810510847 )^(1/4)=1+r
0.948832841 =1+r
r=0.948832841 -1
r=-5.12%